/* Copyright (C) 2008  Romolo Camplani, Marco Fortunato, Marco Marelli, Guido Rota, Fabio A. Schreiber et al.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.dei.perla.parser.expressions;

public abstract class Node
{
	/**
	 * Restituisce una Constant col valore del nodo
	 * @return
	 * @throws ConstantCreationException
	 * @throws ConstantCastException 
	 * @throws OperationNotSupportedException 
	 * @throws DivisionByZeroException 
	 * @throws ConstantTypeException 
	 */
	public Constant getResult() throws ConstantCreationException, ConstantCastException, OperationNotSupportedException, DivisionByZeroException {
		return new ConstantNull();
	}
	
	public Class<? extends Object> getResultType() throws OperationNotSupportedException {
		throw new OperationNotSupportedException("Incompatible Constant type for the operation.");
	}
	
	public boolean isTypeValid() {
		try {
			this.getResultType();
			return true;
		} catch (Exception e) {
			return false;
		}
	}
	
}


